Matrix scorcher



.Pune 2, 1936. H. A. w. wooD MATRIX SCORCHER riginal Filed June 2, 1932 @HHHHHHHHHHJ T- |--!-1--!..i-- J n n u n v O T/ 0 J4 M ...MH H....H.u.1....l...- w v y /37 dar-n.17;

Patented June 2, 1936 UNETED STATES PATENT OFFICE MATRIX SCORCHER Application June 2, 1932, serial No. 614,919 Renewed November 1, 1935 2 Claims.

The principal objects of this invention are to provide means for holding a matrix securely in a definite position while drying in a scorcher to eliminate the shrinkage and produce a matrix which reproduces the printed matter accurately in the proper position.

The invention is particularly useful in stereotyping where it is desired to print different colors as the several matrices for producing the different plates can all be registered, not only in accurate form, but accurately with respect to each other.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing, in which Fig. 1 is a plan of a matrix prepared for the scorcher;

Fig. 2 is an end elevation of a matrix scorcher constructed in accordance with this invention, and

Fig. 3 is a side elevation of the same, partly broken away.

This invention relates to the art of stereotyping and to the scorching or drying of the papiermache matrix. It is particularly useful when it is desired to print in different colors because the several matrices for the plates of different colors are, of course, individual and unlike each other and it is desired to have the prints made from the plates register with each other in the press. It is desirable to have the matrices all located in the same position with respect to the casting mold and to prevent the matrices from shrinking when drying,

The invention is applicable to flat and curved matrices. Fig. 1 shows a matrix I0 of the usual curved form except that it has pin holes I I in its four corners. This matrix is put in a scorcher comprising an inner convex wall or surface I2 and a curved cover I3 hinged thereto at I4. This cover is provided with a locking means I5 on the other side to hold it closed. The means for heating the scorcher inside is not shown herein as any gas or other heating means can be employed.

The inner wall of the scorcher is provided with opposite radial pins I 6 near the bottom of the wall. The matrix is placed in the position shown in Fig. 2, held in place by four pins I6 passing through the pin holes I I. As these pins are substantially perpendicular to the surface on which they are located, and as they are permanent, all matrices dried in this scorcher will be located exactly in the same place and the shrinking to which matrices are ordinarily subjected during the scorching process will be prevented.

The pin holes I I can be made during the molding of the matrix or punched in after the matrix is molded but in any event they are placed accurately so that they will register with the permanent locating pins I6 on the scorcher.

This is a very simple means by which a matrix can be held in the scorcher in such a way that it will not shrink during the drying operation and also in such a way that the margins of all ma*- rices dried in these scorchers will be in exactly the same place in case it is desired to have the different matrices register with each other in the subsequent operation of the producing of the plates.

Although I have illustrated and described only one form of the invention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited in this respect, otherwise than as set forth in the claims, but what I claim is:-

1. The combination with a matrix scorcher having projections fixed in definite positions therein, of matrices molded with depressions for receiving said projections, whereby successive matrices are scorched in registering positions.

2. The combination with a matrix scorcher having projections xed in definite positions therein, of matrices preformed with recesses for receiving said projections, whereby successive matrices are scorched in registering positions.

HENRY A. W'ISE WOOD. 

